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(No Mode-1.)

Patented. Deo. 1, v1891.

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(No Model.) l v 2 ShetS-Sheet 2,

W. MOK. JENNE.

TYPE WRITING MACHINE.

No. 464,436. Patented Dem-1, 1891.

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UNITED STATES PATENT OEEICE.

VILLIAM MCKENDREE JENNE, LOF ILION, ASSIGNOR T-O THE STANDARD TYPE-IVRITER MANUFACTURING COMPANY, OF NET/'tT YORIQN. Y.

TYPE-WRITING MACHINE.

SPECIFICATION forming part of ietters Patent No. 464,436, dated December 1, 18.91. Application filed January 4, 1888. Serial No. 259,768. (N o model.) Patented in England December 31, 1887I No. 17,974.

To @ZZ whom it may concern.-

i Be it known that I, WILLIAM MCKENDREE JENNE, of Ilion, in the county of Herkimer and State of New York, have invented certain new and useful Improvements in Type- IVriting Machines, of which the following is a specification.

My invention relates to that class of typewriting machines in which a series of type bars or levers are grouped about and arranged to strike at a common point or center,

past which point the paper is carried by a traveling carriage advanced by a spring and controlled in its advance by spacing mechanism.

The invention is more or less fully protected by British Patent No. 17,974, dated December 31, 1887, and has reference particularly to the letter-spacing mechanism and to means for effecting a disengagement of the spacingdogs and rack-bar, such features being hereinafter fully set forth.

In the accompanying drawings, Figurel is a perspective view of a type-writing machine embodying my invention, looking from the rear; Fig. 2, a vertical sectional view from front to rear; Figs. 3, 4, 5, 6, 7, and 8, views illustrating details of construction of the spacing mechanism.

In the drawings, A indicates the frame of the well-known Remington Standard Type- YVriting Machine, to which these vimprovements more especially relate; B, the traveling carriage, and C the rack-frame pivotally connected with the carriage and provided with a rack-bar D, having teeth on its lower chines now 'in use, the yielding dog havinga i movement equal to the length of one tooth. The yielding dog F is pivotally attached to the rigid dog E in such manner that it may notvonly swing with said rigiddog in aplane at right angles to the length of the toothed, rack-bar D, but may also move into and ont of line with said rigid dog, a light spring a' serving to throw it out of alignment therewith when not otherwise -acted upon, and the forward movement of the carriage and rack-v bar serving to carry it into such alignment .whenever the rigid dog passes out of and the yielding dog enters into engagement with the rack-bar, as heretofore. -The dogs are moved forward by the' action of the finger-keys and levers H, acting upon the universal space-bar J and are thrown back by a spring G, coiled aboutthe rock-shaft b of the rigid dog and attached at its ends to the frame A and to the rigid dog, respectively.

Thus far the description applies to the common as well as to lthe new construction..

Upon referring to Figs. 3,' 4, 5, and 6 it will be seen that the yielding dog F ismade in two parts, c and d, pivoted one upon the other;vv each part being cut away in front of the pivot-.

pin, as at e, to permit the upper part c to tip or move sidewise independently of the lower part d in one direction. In rear of the pivot f the upperl member c of the dog-that is, the dog proper--is formed with a projecting arm g, which, when the upper and lower members c and d are straightened up in line with each other, rests upon a stop or support h, projecting rearwardly from the member d, the parts g and 7L thus serving to limit the independent movement of the part c. The parts c and d are each formedwith a seat or 'socket in advance of pivot-pin f, which sockets receive the end of a light coiled spring j, which serves to hold the member c normally upright and the stops g'andh in contact,but yields readily to any force tending to tip the member c forward. It is essential to the accurate working of the spacing mechanism that the bearing-faces ofthe stops g and 7i shall not offer large surfaces for the lodgment of dust, as the accumulation of dust or other matters between the parts would limit their approach and consequently vary the spacing. I therefore make one of the arms g h in the form of an' open frame and the other of a width a little less than that of the openiugii-n IOO said frame, as shown in Fig. 7, from which construction it follows that there is but very small contact-surface, only the rear cross-bar of the frame resting upon the narrow arm. It is immaterial whether one or the other stop be'made in the form of an open frame, and in fact good results may be attained by cutting away the opposing faces of the arms or either of them without adopting the openframe construction, a good form being a flat upper arm and a V-shaped lower arm with the apex of the V uppermost, as in Fig. 8. Heretofore it has been customary to form the hand-,lever carrying the dog, which rotates the platen or impression roll, with a nose'or extension to bear upon and depress finger-piece Cv of the rack-frame C in order to insure the lifting of the rack before beginning the backward movement of the carriage. Having removed the danger of injury tothe machine from failure to thus lift the ing also the finger-piece C at-fthe right hand.

Ass

I accordingly drill into the end of the rackframe C a suitable distance and insert into the hole thus formed the laterally-bent end of a rod or lever C2, which extends over the hinge-rod of the carriage and beneath the carriage and turns upward just in front of the roll I, as shown in Fig. l,in convenient position to be depressed by the left hand. The endof the rod or lever C2 may be made fast to frame C by set-screw, pin, or equivalent fastening. yInstead of a wire, which is preferred because of its cheapness and suitability for the place, the lever maybe of other form of material, but in all cases will be under the construction. herein claimed, a rigid varm directly attached to or forming a part of frame C.' No claim is herein made to the release-lever except when thus directly applied to frame C, as above set forth, it being old to employ a lever separate from but adapted to act upon and lift the frame C.

With long-continued use the dogs E F or their stops become more or less worn, causing the spaces made between letters and words to be greater than when the machine isnew. To compensate for such wear, as well as to facilitate nice adjustment in the first instance and to permit the spacing to be made toysuit the special type used in each machine, I provide an adjustable stop K to limit the movements of the yielding dog F relatively to the rigid dog E. This stop consists, primarily, of a metallic plate or slide having its ends 7c bent at right angles to its body, which latter is formed with a slot Z, through which to pass a guiding and clamping screw m, by which the plate or stop is attached to the rigid dog E, auishown in Fig. l.

'L indicates an vadjusting-screw, of which there may be one or two, as preferred. Vhen two are used, each serves to move the slide or plate K in only one direction, one performing the work of moving the slide and the other limiting such movement and serving as a gage; but when only one is employed it is arranged to move the slide in-both direct-ions. The first of these arrangements is illustrated in Figs. 3, 4, and 5 and the second in Figs. G and 7. y

Referring to'Figs. 3, 4, and 5 it will be seen that both the laterally-bent ends 7c of the slide or plate K are provided with screws L, which are Iscrewed through holes tapped or threaded to receive them'and bear at their inner ends against opposite faces of the upright shank or stem of the rigid dog E. The screws are formed with milled heads by which to turn them, and by turning one backward and the other forward the slide may be moved longitudinally in either direction at will. When at the proper adjustment, the slide is clamped against further or accidental movement by means of the clamping-screw am, passing through slot Z, as above mentioned.

Referring now to Figs. 6 and 7 it will be seen that the screw L is circumferentially grooved, forming a reduced neck or stem n, which enters an open-ended slot o, formed in one of the arms 7s of the slide K. The threaded end of the screw enters a correspondinglythreaded hole or socket in the stem or shank of the rigid dog. E, and owing to Athe fact that the arm lc of the slide iits the groove of the screw and is held between the walls of said groove, it follows that as the screw is turned in or outu the slide willbe moved forward or backward with it, the clamping-screw m being of course loosened before and tightened after adjustment of the slide. That arm 7c of the slide K which forms the stop for the yielding dog Fis preferably furl nished with a pad p, of leather or other suitable material, to prevent undue noise or wear. It is also apparent that the precise' .manner of swiveling the screw in the arm 7c is immaterial, the plan shown being, however, cheap and efficient,

Having thus described my invention, what I claim is IOO IIO

l. In combination with the traveling paper- C to a point in front of the roll or platen of carriage B, as and for the purpose set forth.

3. In combination with the carriage and rack-bar of a type-writing machine, a yielding dog adapted to be put alternately into and out of engagement with said rack-bar, a stop to limit the play of said dog, and an adj Listing-screw for moving said stop relatively to the doog.

4. In combination with the carriage and rack-bar of a type-writing machine, a yielding dog adapted to be put alternately into and out of engagement with said rack-bar, a stop to limit the movement of the yielding dog, an adjusting-screw for said stop, and a gage-screw to limit the movement of the stop.

5. In combination with the carriage and rack-bar of a type-Writing machine, aryielding dog arranged to be pnt alternately. into and out of engagement with said raok-bar,a

stop to limit the lateral play of the yielding dog, an adj usting-Screw for moving Said stop, and a clamping-screw for retaining said stop at any desired adjustment.

6. In combination with carriage B, its rackframe C, rack D, dogs E F, stop K, clamping-screw m, and adj listing-screw L, all substantially as described and shown'. Y

In Witness whereof I hereunto set my hand in the presence of two Witnesses.

WILLIAM MCKENDREE JENNE.

Witnesses:

THos. RICHARDSON, A. D. RICHARDSON. 

